For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people.
Genuine GM parts have one of these marks:

Vehicle Care
California Proposition 65 WarningMild Steel
This information provides repair recommendations and general guidelines for
steel classified as Mild Steel. This type of steel normally has a
tensile strength less than 270 MPa. This includes the common steel names of:
Mild Steel
Bake Hardenable Steel (BH)
Solid Solution Strengthened Stee ...
Radio Frequency Statement
This vehicle has systems that operate on a radio frequency that comply with Part
15 of the Federal Communications Commission (FCC) rules and with Industry Canada
Standards RSS-GEN/210/220/310.
Operation is subject to the following two conditions:
1. The device may not cause harmful interferenc ...
Relieving Fuel Pressure Warning
Warning: Remove the fuel tank cap and relieve the fuel system
pressure before servicing the fuel system in order to reduce the risk of
personal injury. After you relieve the fuel system pressure, a small amount of
fuel may be released when servicing the fuel lines, the fuel
injection pump, or ...